Abstract:Почвенное районирование Китая было проведено как частъ работы комплексного природного районирования.

Abstract:Clay particles of less than 1μ were separated from 18 selected soil samples,representing important types of red and yellow soils of southern China. Composition of clay minerals was identified by X-ray defraction, difFerential thermal analysis, base exchange capacity and chemical constituents. Zonality of the weathering stage of the soil, as shown in Fig. I, is explained briefly as follows.

Abstract:关于热带地区的土壤,虽然积累有广泛的世界文献资料,但无论是在其发生方面,或是其受植被演替及其他因素影响的演变方面,都还很不清楚。原因是因为各国学者都片面地偏重于研究土壤的化学和矿物学,旨在阐明热带各种自然地理条件下成土母质的风化过程和风化阶段。

Abstract:A new method for complete analysis of soil colloid was proposed.The SiO₂, content was determined by the loss of weight of HF-HN0₃ evaporation and ignition at 870-9000C for 30-40 minutes.

Abstract:Сравнив некоторые методы определения,емкости поглощения катионов,мы считаем,что метод Е.В.Бобка(BaCl₂-H₂SO₄) позволяет в сравнителъно болышом объеме правилвилъно определить емкость поглощения ионов почвы и глинистых минералов.

Abstract:在过去三十年的土壤学教材中,对于酸性土壤(特别是红壤)的磷素固定作用异常强调,以为可溶性磷一经施入在强酸性土壤以后,大部分以铝铁磷酸盐沉澱,不能被植物所吸收。同时许多测定土壤有效性磷的方法,在应用于施有大量过磷酸钙的红壤标本上,也得不出有正面的结果。